<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
        <title>21jQuery位置和尺寸操作的方法</title>
        <style>
            *{
                margin: 0;
                padding: 0;
            }
            .father{
                width: 200px;
                height: 200px;
                background: red;
                border: 50px solid #000;
                margin-left: 50px;
                position: relative;
            }
            .son{
                width: 100px;
                height: 100px;
                background: pink;
                position: absolute;
                left: 50px;
                top:50px;
            }
        </style>
        <script src="http://code.jquery.com/jquery-1.12.4.js" 
        integrity="sha256-Qw82+bXyGq6MydymqBxNPYTaUXXq7c8v3CwiYwLLNXU="
        crossorigin="anonymous"></script>
        <script>
            $(function name(params) {
                var btns=document.getElementsByTagName("button");
                //监听获取
                btns[0].onclick=function (param) { 
                    //获取元素宽度
                    console.log($(".father").width());
                    //offset([coordinates])
                    //作用：获取元素距离窗口的偏移位
                    console.log($(".son").offset().left);
                    //position()
                    //作用：获取元素距离定位元素的偏移位
                    console.log($(".son").position().left);
                 }
                 
                //监听设置
                btns[1].onclick=function (param) { 
                    //设置元素宽度
                    $(".father").width("500px");
                    $(".son").offset({
                        left:10
                    });

                    //position方法只能获取不能设置
                    $(".son").position({
                        left:10
                    });
                }
            });
        </script>
    </head>
    <body>
        <div class="father">
            <div class="son"></div>
        </div>
        <button>获取</button>
        <button>设置</button>
    </body>
</html>